Ah, that would be the "fringe" effect built into UE4. I threw it in early on just because I was messing with the new post pro stuff in UE4, then decided to get rid of it when I saw how blurry it was making the image.
More work on decorations/details for the buildings. Made some hanging variants of the shop signs, a window planter with a few variants, and a modular set for rain gutter piping. Done! And I also added a proper metallic map to those letters to give them a nice gold shine. I was worried about lightmapping on the letters…